Bacteria: Quick-Change Artists?
What will be an ideal response?
•Example 1: A bacterium living in pot of dressing at a salad bar, suddenly transported into a pool of stomach acid.
•Example 2: A bacterium living inside an insect host, suddenly injected into a human arm.
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The two strands of the DNA double helix are held together by
A) 5' to 3' attraction. B) hydrogen bonds between nucleotide bases. C) codons. D) peptide bonds between nucleotide bases.
The minimum amount of energy needed to get a chemical reaction started is called the ____ energy
a. activation b. reaction c. enzymatic d. chemical e. triggering
Implantation occurs approximately
a. one day after fertilization. b. three days after fertilization. c. one week after fertilization. d. two weeks after fertilization. e. one month after fertilization.
During which stage of the cell cycle do the chromosomes duplicate?
A. telophase B. prophase C. mitosis D. anaphase E. interphase